'UNLOCKED'
 

I have this RCA CTC185A7 with the following problem: When turned on and signal
comes on, it shows the word "UNLOCKED" at the bottom of the screen and the
up/down channels don't have any action, the same channel number remains all the
time.
Does any one has any idea as to what the problem is and if it's to difficult to
fix?
Your comments will be very much appreciated.
TIA
Alphie